Working on latest Osu! Patch. (Dunno which date, i just know it has updated). Current Date: 7-8-2015
Thanks for posting this, it would have been nice if the developer of the tool mentioned to download this.
Works. Just tested before i posted this comment. It might be because you don't have the latest Visual C++ Redist. installed (see link above).
This could have multiple reasons:
1. You don't have 120 FPS.
2. The tool doesn't have enough CPU/RAM to function well
3. Some maps are inpossible to 100%, even with the lowest settings.